Fantomas update

[isaacabraham]

This PR closes #1115. Updating to Fantomas 6 gives nicer formatting (especially with anonymous records) and leads to around a 4%-5% line count reduction. More than that, it also stops massive horizontal indentation, especially with anonymous records.

The changes in this PR are as follows:

• Update the dotnet tool to Fantomas 6
• Update editor config
• Apply to all files

I have read the contributing guidelines and have completed the following:

• [ ] Tested my code end-to-end against a live Azure subscription.
• [ ] Updated the documentation in the docs folder for the affected changes.
• [ ] Written unit tests against the modified code that I have made.
• [x] Updated the release notes with a new entry for this PR.
• [x] Checked the coding standards outlined in the contributions guide and ensured my code adheres to them.

If I haven't completed any of the tasks above, I include the reasons why here:

• Testing code / updating docs not required - only formatting.

[ninjarobot]

The build error looks to be from the -r option. They removed --recurse in 6.0. Maybe it just does this by default?

[isaacabraham]

Oops yes. It's not required any longer, I'll update that